Display screen with a graphical user interface



FIG. 1 is a front view of a first embodiment of a display screen with a graphical user interface showing my new design; and,

FIG. 2 is a front view of a second embodiment of a display screen with a graphical user interface showing my new design.

The features shown in broken lines in the drawings depict environmental subject matter only and form no part of the claims design. The dashed-dotted lines denote the boundary of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 